JPH0722891B2 - Random loading machine - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a random loading machine that sequentially switches the loading position of a loading target into a plurality of types and loads the loading target.

(Prior art and its problems) For example, when a printed circuit board is put into a buff roll of a polishing machine, if it is always put in a fixed position, only a fixed part of the buff roll is used, and the life of the buff roll is shortened. Therefore, it is desired to set a plurality of loading positions of the loading target such as a printed circuit board in the width direction and sequentially switch loading positions to load the loading target.

As a device for achieving such an object, there is a random throwing machine, but the conventional random throwing machine uses a robot of a Cartesian coordinate system attached with a vacuum suction device, and sucks up an input object by the vacuum suction device. Therefore, it is very expensive, and when the transported object is a printed circuit board, it may not be adsorbed due to the size and position of the holes.

(Means for Solving Problems) According to the present invention, a plurality of rollers 4 for conveying an input object 5 and first and second moving bodies 12, 13 parallel to each other along the arrangement direction of the rollers 4 are provided. , These first and second moving bodies 12,
A plurality of first and second projecting members 15 projecting from 13 between the rollers 4 and capable of contacting the side surface of the article 5 to be charged,
16, first and second drive cylinder devices 17 and 18 for separately moving the first and second moving bodies 12 and 13 in the axial direction of the roller 4, and the first and second movements. First and second racks 19 and 20 respectively fixed to the bodies 12 and 13; and first and second pinions 23 and 24 respectively meshing with the first and second racks 19 and 20, respectively. One rotary shaft 22 to which the first pinion 23 is fitted and fixed on the outer peripheral surface and the second pinion 24 is rotatably fitted to the outer peripheral surface, and the rotary shaft 22.
And an electromagnetic clutch 25 that releasably connects the second pinion 24 and the second pinion 24, and the first and second drive cylinder devices 1
7, 18 and the electromagnetic clutch 25 are controlled to sequentially change the position of the object 5 on the roller 4 in the roller axial direction by the first and second protrusions 15 and 16 into a plurality of types. And a circuit 38 for sequentially changing the charging position of the object 5 to be charged.

(Operation) When the first drive cylinder device 17 is operated, the first projecting body 15 moves together with the first moving body 12 in the roller axis direction. When the second drive cylinder device 18 is operated, the second projecting body 16 moves in the roller shaft core direction together with the second moving body 13. When the electromagnetic clutch 25 is engaged, the first pinion 23 and the second pinion 24 rotate together with the rotary shaft 22. Therefore, if one moving body 12 moves, the rack 19
The power is transmitted to the other moving body 13 via the pinion 23, and the other moving body 13 moves in the opposite direction to the one moving body 12. The control device includes the first and second drive cylinder devices 1
By controlling the operation timings of 7 and 18 and the electromagnetic clutch 25, the positions where the loading target 5 on the roller 4 is sandwiched between the first projecting body 15 and the second projecting body 16 are sequentially switched. As a result, the loading position of the article 5 is sequentially changed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a front view of a random throwing machine in one embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view of a main part of the random throwing machine, and FIG. 4 is a side view of the same. . 1 to 4
In the figure, 1 is a side plate standing on both sides of the pedestal 2,
Both ends of a plurality of rotary shafts 3 are rotatably supported on the upper ends of the side plates 1. Rollers 4 are fitted and fixed to the outer peripheral surface of each of the rotary shafts 3, and the rollers 4 are arranged in the horizontal direction and parallel to each other. These rollers 4 are for transporting the object 5 to be charged in the direction of arrow A, and a sprocket 6 is fitted and fixed to the outer peripheral surface of one end of each rotating shaft 3. The sprocket 6 and the sprocket 8 fixed to the output shaft of the electric motor 7 installed on the pedestal 2 mesh with an endless chain 9, and the roller 4 is rotationally driven in a certain direction by the electric motor 7. And the object 5 is conveyed in the direction of arrow A.

Both ends of a pair of guide shafts 10 located below the rollers 4 are fixed to the both side plates 1, and the guide shafts 10 are arranged in parallel with the rollers 4. A housing 11 is fixed to the central portion of the guide shaft 10 in the axial direction across both guide shafts 10, and a first moving body 12 and a second moving body 13 are arranged with the housing 11 interposed therebetween. There is.
Both ends of the moving bodies 12 and 13 are slidably supported by the guide shaft 10 via linear bearings 14, and the first and second projecting bodies are provided on the upper surfaces of the moving bodies 12 and 13. 15,16
Are separately projected. These protrusions 15,1
Reference numeral 6 projects from between the adjacent rollers of the plurality of rollers 4 above the upper end of the rollers, and is capable of contacting the side surface of the article 5 to be charged.

Cylinder rod tips of the first and second cylinder devices 17 and 18 fixed to the housing 11 are separately fixed to the movable bodies 12 and 13, and the first and second racks 19 and 20 are also fixed. One end of each is fixed separately. These racks 19 and 20 are parallel to each other and are arranged at regular intervals with their teeth facing each other, but their positions in the height direction are different, and one end of the second rack 20 has a bracket 21. It is fixed to the second moving body 13 via.

A rotary shaft 22 along the vertical direction is rotatably attached to the housing 11, and an outer peripheral surface of an upper end portion of the rotary shaft 22 has a first pinion 23 that meshes with the first rack 19.
Are fitted and fixed. A second pinion 24 that meshes with the second rack 20 is rotatably fitted on the lower outer peripheral surface of the rotating shaft 22, and an electromagnetic clutch 25 is installed below the second pinion 24. . The electromagnetic clutch 25 is attached to the housing 11 via a rotation stop pin 26, and connects the second pinion 24 and the rotary shaft 22 by being energized.

A sensor for detecting the input object 5 is provided in the vicinity of the roller located at the end of the transfer direction of the input object 5 among the rollers 4.
27 are arranged. The sensor 27 comprises a photoelectric switch, and is attached to the gantry 2 via a bracket 28.

FIG. 5 is a circuit diagram of the air system of the cylinder devices 17 and 18. 29 is an air source, 30 is a filter regulator, 31 is a regulator, 32 and 33 are solenoid valves, 34 and 35 are silencers, 3
6,37 are speed controllers.

FIG. 6 is a circuit block diagram of the control system of the random throwing machine, 38 is a control circuit incorporating a timer circuit 39, to which the signal from the sensor 27 is input, and the solenoid valves 32, 33.
And a control signal is output to the electromagnetic clutch 25 and the electric motor 7.

Next, the operation will be described. When the loading target 5 is supplied to the random loading machine and is transported on the roller 4 in the transport direction indicated by the arrow A, and the sensor 27 detects the loading target 5, the sensor 27
A detection signal is output from the control circuit 38 and the position of the object 5 is controlled. That is, the tongue control circuit 38 sequentially and repeatedly executes the following five types of control patterns.

First, in the first pattern, a control signal is output to the solenoid valve 32 to cause the piston rod of the first cylinder device 17 to retract.
At this time, the electromagnetic clutch 25 is turned off without being energized. As a result, the first moving body 12 moves to the right in FIG. 3,
The object 5 is pushed rightward in FIG. 3 by the first projecting body 15 and moves until it comes into contact with the second projecting body 13. As a result, as shown by 5a in FIG. 7, the object 5 is positioned at the right end of the roll width L of the roller 4. After positioning, first
The piston rod of the cylinder device 17 is extended.

In the second pattern, a control signal is first output to the solenoid valve 32 to cause the piston rod of the first cylinder device 17 to retract.
As a result, the object 5 is pushed by the first projecting body 15 and moves to the right. Then, after a time t1 measured by the timer circuit 39, a control signal is output to the electromagnetic clutch 25 and the electromagnetic valve 33 to turn on the electromagnetic clutch 25 and retract the piston rod of the second cylinder device 18. When the electromagnetic clutch 25 is turned on, the first pinion 23 and the second pinion
Since 24 and 24 rotate together with the rotary shaft 22, the first moving body 12
And the second moving body 13 moves at the same speed in the opposite direction. That is, the first projecting body 15 moves to the right, and the second moving body 13 moves to the left at the same constant speed as that of the first projecting body 15 to sandwich the article 5 to be inserted. As a result, the input object 5 is positioned to the left by L1 as compared with the case of the first pattern, as shown by 5b in FIG. After positioning, the first and second cylinder devices 17,1
Extend the piston rod of 8.

The third pattern outputs a control signal to the electromagnetic clutch 25 and the electromagnetic valves 32 and 33 to turn on the electromagnetic clutch 25 and retract the piston rods of the first and second cylinder devices 17 and 18. Thereby, the first and second moving bodies 12, 13
Moves at the same speed in the opposite direction, that is, the first projecting body 15 moves to the right and the second projecting body 16 moves to the left to sandwich the article 5 to be inserted. As a result, the object 5 is positioned at the center of the roll width L as shown by 5c in FIG. This position is to the left by L2 than in the case of the second pattern. After positioning, the piston rods of the first and second cylinder devices 17, 18 are extended.

In the fourth pattern, a control signal is first output to the solenoid valve 33,
The piston rod of the second cylinder device 18 is retracted.
As a result, the second moving body 13 moves to the left, and the load 5
Is pushed by the second protrusion 16 and moves to the left. Then, after the time t1 measured by the timer circuit 39, the electromagnetic clutch
25 and the electromagnetic valve 32 to output a control signal to the electromagnetic clutch 25
Is turned on and the piston rod of the first cylinder device 17 is retracted. As a result, the first moving body 12 and the second moving body 12
Moving body 13 moves at the same speed in the opposite direction, that is,
The projecting body 15 moves to the right and the second projecting body 16 moves to the left, and the object 5 is sandwiched. As a result, as shown by 5d in FIG. 7, the input object 5 is L2 more than the case of the third pattern.
Only positioned to the left. After positioning, first and second
The piston rods of the cylinder devices 17 and 18 are extended.

The fifth pattern is to output a control signal to the solenoid valve 33
The piston rod of the cylinder device 18 is retracted. At this time, the electromagnetic clutch 25 is turned off. As a result, the second moving body 13 moves to the left, and the loaded object 5 moves to the second projecting body 16
It is pushed by and moves until it comes into contact with the first protrusion 15.
As a result, the input object 5 is positioned at the left end of the roll width L as shown by 5e in FIG. This is to the left by L1 than in the case of the fourth pattern. After positioning, the piston rod of the second cylinder device 18 is extended.

The object 5 thus positioned is conveyed by the roller 4 and is charged into, for example, a buff roll of a polishing machine. That is, when considering the set of five objects 5 to be introduced, these five objects 5 to be introduced are all introduced into the buff roll at different positions in the roll width direction. After all, every 6 pieces will be thrown in from the same position.

The roller 4 may be rotated or stopped at the time of positioning.

(Other Embodiments) In the above embodiments, five types of control patterns have been described, but the number of control patterns can be freely increased by increasing the number of timer circuits 39 set. That is, the type of input position can be set freely.

(Effect of the Invention) As described above, according to the present invention, the first and second moving bodies 12, 13 are driven by the first and second drive cylinder devices 17, 18.
Is driven, and the object 5 is sandwiched and positioned by the first and second projecting bodies 15 and 16 projecting from the moving bodies 12 and 13. The structure is extremely simple as compared with the one in which a vacuum suction device is attached, and it can be manufactured at a very low cost, and at the same time, positioning is impossible even if the object 5 is a printed circuit board or the like with holes. Never.

Further, the first and second racks 19 and 20, the first and second pinions 23 and 24, the rotary shaft 22, and the electromagnetic clutch 25 allow the first
The moving body 12 and the second moving body 13 are detachably coupled to each other,
When the first moving body 12 and the second moving body 13 move at the same time, the first moving body 12 and the second moving body 13 always move at a constant speed, so that the positioning can be accurately performed even though it is an inexpensive device as described above.
Moreover, the first pinion 23 and the second pinion 24 are attached to the rotary shaft.
Since the second pinion 24 and the rotating shaft 22 are engaged with each other by the electromagnetic clutch 25, the power transmission mechanism between the first pinion 23 and the second pinion 24 is a rotating shaft. 22 and electromagnetic clutch 25 are simple,
Therefore, the manufacturing cost can be reduced and the device can be made compact.

[Brief description of drawings]

FIG. 1 is a front view of a random throwing machine according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view of a main part of the random throwing machine, and FIG. 4 is a side view of the same. FIG. 5 is a circuit diagram of the air system of the cylinder device, FIG. 6 is a circuit block diagram of the control system, and FIG. 7 is an explanatory diagram showing the types of positioning of the input object. 4 ... Roller, 5 ... Subject, 12 ... First moving body, 13 ... Second moving body, 15 ... First projecting body, 16 ... Second projecting body, 17
... first cylinder device, 18 ... second cylinder device, 19 ...
First rack, 20 ... Second rack, 22 ... Rotating shaft, 23 ... First pinion, 24 ... Second pinion, 25 ... Electromagnetic clutch, 38 ... Control circuit

Claims (1)

[Claims] 1. A plurality of rollers (4) for carrying an input object (5), and first and second moving bodies (12, 13) parallel to each other along the arrangement direction of these rollers (4), These first
And a plurality of first and second projecting bodies (15, 16) that project from the second moving body (12, 13) between the rollers (4) and can contact the side surface of the article (5). ) And the first
And the second moving body (12, 13) separately for the roller (4)
And second drive cylinder devices (17, 18) for moving in the axial direction of the first and second moving bodies (12, 13)
First and second racks (19, 20) secured separately to each other
A first and a second pinion (23, 24) meshing with the first and second racks (19, 20) respectively, and the first
The pinion (23) is fixedly fitted to the outer peripheral surface of the second pinion and
Rotating shaft (22) in which the pinion (24) of the above is rotatably fitted to the outer peripheral surface, and an electromagnetic clutch that releasably connects the rotating shaft (22) and the second pinion (24). (twenty five)
On the roller (4) by controlling the first and second drive cylinder devices (17, 18) and the electromagnetic clutch (25) by the first and second projecting bodies (15, 16). And a control circuit (38) for sequentially changing the position of the object (5) in the axial direction of the roller into a plurality of types, and sequentially changing the position of the object (5). A random loading machine.